Method of utilizing steel-scrap.



JOHN P. WOODS BECKMAN, OF

PARNASSUS, PENNSYLVANIA.

METHOD UTILIZING STEEL-SCRAP.

cancel.

No Drawing.

PnensoN Woons xact description.

My invention relates to a novel method for utilizing steel scrap whichis rich in silicon or other alloys, and is designed to provide anefficient and practical method whereby scrap of this character may beutilized without substantial loss in its alloy content by using for thepurpose the excess heat of molten steel or molten steel alloys to meltthe scrap. Ithas been customary heretofore to treat scrap of thischaracter by melting it in a furnace in which its silicon or other alloycontent is burned away and goes into slag and becomes waste product. Bymeans of my improved method I am enabled to utilize substantially all ofthis alloy content in the scrap.

In accordance with my invention, I take the scrap containing silicon orother alloy content, and heat it in a closed vessel or furnace whosetemperature is below the term perature required to fuse the scrap insuch a manner as to prevent any substantial OXielation. bringing thescrap up to a white heat. I then add to the scrap molt-en steel whichhas been melted in a separate vessel or furnace and thus utilize theexcess heat of this steel to melt the scrapwhich has been preheated to apoint slightly below its melting point. In this manner I am able toutilize practically all of the alloy content of the scrap without lossand at a very slight additional cost. By the use of a furnace whosetemperature is below the tempera ture required to fuse the scrap I amenabled to heat scrap of varying thickness to the same degree, therebyovercoming any loss of alloy contained in the small particle of thescrap, which would occur if the scrap were heated in a furnace whosetemperature was above the temperature required to fuse the Specificationof Letters Patent.

Application filed January 27, 1908.

Patented Jain. 1.8, 1910.

Serial No. 412,899.

same, as the small particle would be fused before the. large particleswere heated throughout to the required temperature.

I claim 1. The herein described method of utilizing steel scrap, whichis rich in silicon, which consists in preheating the scrap in a furnacewhose temperature is below the fusing point of the scrap withoutsubstantial oxidation thereof. and adding thereto molten metal, andutilizing the excess heat of such metal to fuse the scrap; substantiallyas described.

.2. The method of utilizing steel scrap, which consists in preheatingscrap which is rich in silicon or other alloy content in a furnace whosetemperature is below the fusing point of the scrap, and then pouringmolten metal into the furnace containing the heated scrap and utilizingthe excess heat of the molten metal to fuse the scrap; substantially asdescribed.

3. The herein described method of utilizing the alloy content of steelscrap which is rlch in silicon or other mctalloid, which consists inpreheating the scrap in a closed vessel or furnace in a furnacewhosetemperature is below the fusing point of the scrap, and then addingmolten steel thereto and utilizing the excess heat of the molten metalto fuse the scrap; substantially as described. l. The method which.consists in preheat- 'ing scrap which. is rich in silicon or othermetalloid in a furnace Whose temperature is below the fusing point ofthe scrap, and then adding molten iron or steel to the preheated scrap,without removing it from the vessel in which it is heated, to therebymelt the same and thus preserve in the steel the metalloid content ofthe scrap; substantially as described.

In testimony whereof, I have herelnito set my hand.

JOHN P. WOODS BIGCICMAN. Witnesses:

H. M. Conwm, GEO. ll. PAnMnLnn.

